Carbureter.



R. B. BENJAMN.

CARBURETR. APPLICATION meu 1uNEs.|s\4. 1,266,956. Patented Mar.26,1918.

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H. B. BENIAMIN.

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APPLICATION FILED JUNE 6| |914- 1,260,956. Patented Mar. 26, 191'8.

UNITED STATES PATENT OFFICE.

BEURER B. BENJAMIN, 0F CHICAGO, ILLINOIS, ASSIGNOB. T0 BENJAIIN ELECTRIC ANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CABBUBETER.

Specicatlon ol Letters Patent.

Patented Mar. 26, 1918.

To au w/iom t may concern:

Be it known that I, Renens B. BENJA- MIN, n citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new und useful Improvements in Carbureters, of which the following is o. full; clear, concise. and exact descriptlon, reference being had tothe accompanying drawing, forming s. part of this specification.

My invention relates to carbureters for internal combustion engines.

It is 4one ot' the objects ot' my invention to provide a carbureter in which delivery of the fuel to the mixing chamber in globules is avoided.

Further objects otl my invention are to provide a carbureter in which undue wear in the moving parts is eliminated: to provide a czubureter that is readily adjust-able; and to provide o carbureter that is economi` cal to manufacture and etlicientfin its operation.

A further object of my invention is to provide an improved car ureter in which inertia means are provided for acting in opposition to the inertiaV of n suction controlled valve, whereby the had effects due to the jarring of the carbureter will be minimized.

Additional objects and advantages of my invention will be apparent from the following description teken in connection with the up ended claims.

n the following specification and accomanying drawings I have described and illustrated :i carburetor constructed in accordance with my invention but it is to be clearly understood that numerous changes may be Inode in the form. construction and arrangement of the parts without departing from the spirit of my invention or exceeding the scope of the a pended claims, the form of the invention being merely one preferred embodiment thereof.

In the drawings:

Figure 1 is a cross sectional view of a. carburetor constructed in accordance with my invention, the section being taken on the line 1-1 of Fig. 3, looking 1n the direction of the arrows;

Fig. 2 is a top rotary valve;

viewishowing part of the Fig. 3 is a cro sectional view on eren disclosed the line 3 3 of Fig. ret-tion of the arrows;

Fig. 4 is a. similar view taken on the broken line l--l of Fig. 1; and

Fig. 5 is a similar view taken on the line of Fig. 3. l

The carbureter has a fuel chamber 6 in which is a lient member 7 carried by an arm 8 pivoted to the casing as at 9 and einbracm o needle valve 10 which regulates the a mission of the fuel from the tanks to retain the stime at u substantially constant level. In the center of the fuel chmber the casing forms an air passage l1 which communicates with n main air intake 1:?. at* the top and on telle shou ders formed by the contracted portion seins a rotary valve 13, which, as will hereinafter a pear, controls the admission of both the el and air to n pipe 1l, provided with a butterfly valve 15, leading to the intake manifold. The valvel, which is mounted on a stem 16, is tapered substantially in the form afan inverted cone the lower portion of which seats in cylindrical recess 17 formed in projection 18 of the Casing extending into the air passage 11.

Tocontrol the extent of the vertical displacement of the vulve 13 a rod 19 is con nected with n bifurcitted lever 20 which is pivoted to the casing ns :it 221 and embraces 1i sleeve Q2 in which the valve stem 16 rorates. The rod 19 connected in an snit- :ible manner with the accelerstornd it will be apparent that its depresion will cause an increased vertical displacement of the vulve. To prevent inj tngthevalve by any undue pressure on rod 19 the' displacement of the intter is" by a stop lil-f' comprising a screw w 'ch can be removed to allow fuel chamber lib be drained when desired.

Opening of the valve 13 is opposed by a coiled spring 23 embracing the rod19 which can be adjusted by the nut 24 to give the proper o position to the suction on the valve un er existing conditions.

The recess l? is 'in effect a part of the fuel chamber as it is connected with the main portion of the chamber by a large pw sage 25, a duct 26 leading .to its upper portion, and a duct. 27 leading tothe lower por tion when the conical end of the .stem 16 seats. As the valve and valve stem thus l, looking in me oi- 1 il his air pnssnfre 1s slightly contrae 1 ,and causes t e member 28 to rotate when the valve is opened, thus rotating the latter.

To regulate the proportion o -air in the mixture, I provide an auxiliary air supply which. enters thema`in mixture passage vir a duct 30 leading from a port 31 and which lio is.- controlled by a spring pressed valve 32 which is opened, by the suction of the cylinders. T e amount of air thus admitted can be regulated by a rotatable member 33 bearing on the spring 34 of the. valve, its manipulation causing the spring to oppose the opening of the valve to a greater or less degree. T is member l33 may be connected to operating means on the dashboard of the vehicle in. any suitable manner.

In operation .the vacuum produced by varying speeds and performances of the engine-causes thus opening the fuel and air passages pro ortionately,l the flow of air striking the lades 29 and thus causing the valve 13 to rotate. Owing to the large diameter of the valve only a slight clearance is necessary and therefore Athe rotation will grind the fuel and cause it to flow out into the passage 11 in a ver thin film and the centrifugal force sprea s this lm out over a large surface exposed to the air rushing in from the port 12. The air is `preferably previously heated and so will heat the fuel as it passes along the surface of the valve so as to assist in the vaporizing action. In this` way the air and fuel are mixed under the most favorable conditions and with none of the fuel in globules. y

The relation of the amount of air totthe fuel to meet variations in temperature, altitude fuel conditions and the likeis.regu' lated by adjustment of the auxiliary air supply valve 32, which is also opened by the vacuum produced in the engine,`by means of the member 33 as before described.

After the valve has opened to a position which gives the maximum air opening the valve can be raised still farther by the accelerator through the rod 19 and the lever 20. The end of the recess 17 in which the valve seats is in effect a nozzle and owing to the taper of the valve its increased vertical displacement opens this nozzle farther so as to increase the richness of the' mixture. 'It will be noted that the inertia of the rod 19 and nuts 24 acts in opposition tothe inerthe valve 13 to open vertically,`

tia. of the valve 13 and sleeve 22 to minimize the undesirable'eiect on the valve of the jarrin of the vehicle. Without this counter-ba ancing feature if the carbureter is caused to move upwardl suddenly the inertia of the valve 13 an sleeve 22 would causethe valve to move toward closing position resultmg 1n undesirable fluctuations of the valve. Similarly a sudden movement downward of the carbureter without the counter-balancing feature would cause the valve to be opened wider. With the counter-balance, however, the m and down of the carbureter will ave little effect on the operation of the valve 13.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A carbureter comprising a fuel supply, an outlet porttherefrom, an air passage having a port, and valve means movable as a `unit comprising acontinuously tapered member, thesmaller part of which extends into said fuel port to control the ilow of fuel, and the larger part of which coperates with said,air port to control the liow of air, and an airmotor in said air passage connected to said valve means for rotating 1t.

2. In a carbureter, the combination with a fuel supply and an air supply, of means for contro ling the flow of fuel from said supply, comprising a suction operated valve mounted for movement with respect to its seat, and inertia means for preventing relative movement between said valve and seat due to, the movement of the carbureter, whereby fluctuation of the valve due to the movement of the carbureter is revented, said means comprising a mass. o substan tially equal weight to that of the-valve connected to said valve for countsrbalancing the same.

3. In a carbureter, the combination with a fuel supply and an air supply, of means for contro ling the How of fuel from said supply, comprising a suction operated valve mounted for movement with respect to its seat, and inertia means for dpreventing relative movement between sai valve and seat due. to the I movement of the carbureter, whereby iuctuation of the valve due to movement 'V of the carbureter is prevented, said means comprising a lever ofthe first class having one end connected to the valve, and a lmass of substantially equal `weight connected to the other end of the lever for counterbalancing the valve.

4. In a carbureter, the combination with a fuel-supply and an air-supply of means for controlling the flow from one of said supplies comprising a suction-operated valve mounted for movement with respect to its seat, and inertia means for preventing rela,- tive movement between said valve and seat vement up duefto the movement of the carbureter, 130

'wherebyY uctunton of the valve due To scribed my name in the presence of two Wt movement of the carbureter is preventedf. messes` said means comprising a mass the moment o v y y nortia of which is substantially equa and REUBE B' BEbJAMlN opposite to that of the valve, connected to W'itnesses: said valve for counterbalancing it. E. R. KING In witness whereof, I have hereunto sub- H. Mom HUMASON. 

